Joseph bbatol



(Ne Model.) 7

J. BRANDL.

STEAM GENERATOR.- No. 288,688. Patented Nov. 20, 1883.

ATTO EY5 INVENTOR her. Washingt WITNESSES: Q. 554%? exterior wall of the boiler.

UNITED STATE PATENT OFFICE.

JOSEPH BBANDL, OF NEW YORK, N. Y.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No..288,688, dated November 20, 1883.

. Application filed September 10, 1883. No model.)

To all whom it may concern Be it known that I, Josnrrr BRANDL, of the city, county, and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

This invention has reference to an improved steam-generator combined with chambers for superheating the steam; and the invention consists of an upright boiler that is provided with a steam-dome. In the interior of the boiler are arranged a series of annular and radially-partitioned casings, which communicate with each other and the steam-dome by valved openings. The furnace is arranged in the cylindrical space inclosed by the casings, while the water for generatingsteam is contained in the annular space between the casings and the The steam that is generated is conducted from the upper part of y the boiler by an exterior pipe into the lowermost casing, and is then successively passed through, the valved casings into the steamdome, from which it is conducted off for use. The exhaust-steam is returned to the steamgenerator, passed through a heating-coil in the water-space of the boiler, and conducted through separate chambers of the casings to the steam-dome, where it niingles with the live superheated steam. The admission of the exhaust-steam to the reheating-coil is controlled by a pressure-regulating device of special construction.

In the accompanying drawings, Figure 1 represents a side elevation, partly in section, of my improved steamgenerator. Fig. 2 represents a vertical central section of the same on line at m, Fig. 3, and Fig. 3, a horizontal section on line y y, Fig. 2.

Similar letters of reference indicate the corresponding parts.

In the drawings, A represents the exterior wall of an upright cylindrical boiler, which is supported on a suitable foundation of masonry, in which the ash-pit is located. In the interior of the boiler A are arranged, one above the other, a series of annular casings, B. Each casing is divided into a number of separate chambers, 12, by radial partitions Z), which chambers communicate with each other by means of openings b having upwardly-open ing valves Zr. In the lowermost casing B the valves that open into the separate chambers of the next casingabove are balanced, so that by the slightest pressure thereon the steam in the lowermost casing .will pass into the second casing. The casings B are connected steamtight to each other by flanged seats 0, so that an open space is formed between the top of one casing and the bottom of the next adj oining casing above, which space communicates with the interior central space inclosed by the casings. Above the uppermost casing B a circular disk, D, is arranged, which disk is also provided with openings if, having also upwardly-opening valves N. The disk D is tightly fitted upon the upper casing B so that the valved openings 6 register with the upper openings of each chamber of the casing B.

Above the disk D is supported a steamdome. E, in which the steam that is superheated in its passage through the casings is collected. From the steam-dome E the steam is conducted by a steam-pipe, e, to the steamcylinder or other place of use.

Asupply-cylinder, E, is arranged centrally in the dome E, and extended above the same. It serves as a supply-hopper to the grate F, located in the space inclosed by the casings B B. The. grate F is made of conical shape and applied to a verticalspindle, F, which is supported at its lower end by a step-bearing, f, in the ash-pit, and at its upper end by a neck-bearing f, in the extension-cylinder E. The grate F is shaken by means of ahandle, f*, at the upper end of the spindle F. The interior walls of the casings B form thus the walls of a cylindrical furnace, while by the open space between each pair of casings the heating-surface of the same is considerably enlarged.

The furnace is fed at the top through the cylinder E by removing the cover f which closes the upper end of the cylinder E. The pipe E is further provided at its upper part with a side opening, which connects by a pipe, f, with a chimney or smoke-stack, so as to carry off the smoke and gases from the furnace. The water for generating steam is contained in the space between the annular casings B and the exterior boiler-wall, A.

The steam generated in the boiler A is conducted from the upper part of the same by an exterior v steam-pipe, G, through the boilerwall into one of the chambers of the lowermost casing B, then to the communicating-chambers of the upper casings into the steam-dome, and thence to the place of use. The exhauststeam is returned to the steam generator through a pressure-regulatin g device, H, which consists of a vertical pipe, h, having two lateral pipes, 71/ and IL2, arranged, respectively, at the upper and lower ends of the pipe h.

In the interior space of the valve-pipe h is fitted a smaller pipe, i, which is closed at the top and open at its lower end, and which is guided therein by the contracted portions h at the upper and lower ends of pipe h. The interior pipe, 6, slides easily up and downin the pipe h, and fits by an exterior top flange tightly on the upper end of the pipe h. The pipe 2' is further provided at its upper part with an opening, 7;, that registers with the upper lateral pipe, h, while the lower pipe, h", is closed by the lower part of the inner pipe, i. WVhen exhaust-steam of a certain pressure passes through the interior pipe, 1', it passes through the upper pipe, h, into the boiler, where it communicates with a heating-coil, a, that is locatedin the water-space of the boiler A. When exhaust-steam of higher pressure is supplied, the interior pipe is raised so that communication with the upper pipe, h, is interrupted, but established with the lower pipe, h ,whereby the steam is allowed to pass into the bottom casing B without passing through the interior heating-coil, a. At a still higher pressure the interior pipe, 1', is raised abovetheupper part of pipe h, so that the steam can pass through its opening 73 into the air. The exhaust-steam, while passing through the heating-coil a, heats the water in the boiler and assists in the quicker generation of steam. It passes into two of the chambers of the lower casing B, which are connected with each other by an opening in their radial partition-wall b,

waste then successively through the communicating chambers of the upper casings, in which the steam is reheated until it is delivered into the steam-dome E, and mingled in the same with the superheated live steam. In this manner steam is generated and superheated by the heat of the same furnace, and also the exhauststeam reheated and utilized. The generator can therefore be operated at a considerable saving in fuel, takes up but a comparatively small space, and supplies superheated steam without requiring a separate superheating device.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of an exterior boiler, interior annular casings communicating with each other, a steam-pipe connecting theboiler with the lowermost casing, a steam-dome above the casings, and a conical grate located in the space inclosed by said casings, substantially as and for the purpose set forth.

2. The combination of an exterior cylindrical boiler, interior annular casings communicating by valved openings with each. other, a steam-pipe that connects the boiler with the lowermost casing, a steam-dome communicating with the uppermost casing, a conical furnacegrate located in the space inclosed by said casings, an interior heating-coil for the exhaust-steam, located in the boiler and connected to the lowermost casing, and a press ure-regulator for the exhaust-steam,connected to the heating-coil and to the lowermost casing, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

JOSEPH BRANDL.

\Vitnesses:

CARL KARP, OTTO RIsoHY. 

